A man pulls a sledge of mass 90kg on horizontal ground by means of a rope inclined at 30o to the horizontal. The acceleration is 0.15m/s2 and the resistance to motion is 100N.

Determine
(i) the tension in the rope.
(ii) the normal reaction between sledge and ground.

You have to resolve in component. This is moving horizontally hence you will equate it to (Newton's Law). It is not moving vertically so you do not equate to as acceleration will be vertically. Drawing a diagram for these questions solves half the question.